Apparatus for spraying oil on road-surfaces.



P. 0. PILLSBURY. APPARATUS FOR SPRAYING 011. ON ROAD SURFACES.

. APPLIOAIION TILED MAILZ'I, 1911.

Patented May 20, 1913.

2 SHEETS-SHEET 1.

' P. 0. PILLSBURY.- I I APPARATUS FOR SPRAYING 0N ROAD SURFACES;

APPLICATION FILED MAB. 2'7, I911.

Patented May 20, 1913.

UNITED sTAT E s PATENT-Damon;

- FRANKLIN o. PILLSBURY, or BOSTON, MASSACHUSETTS, sssrelton 'ro CRESSY, oremuonsmna, msacnusn'r'rs.

APPAR US FOR SPRAYING o1-L ounomrsuarncns.

To all whom it may concern y y Be it known that'I, FRANKLIN 0.- PILLS- BURY, a citizen of the United States, residing at Boston,- count-yof Suifolk, State of.Mas-

sachuset-ts, have invented an Improvement.

' rial on a road. surfacedirectly from a tank spraying attachment adapted to be readily applied to a tank wagon and means for introducing steam under pressure directly into the tank of the tank wagon and on top of the body of oil therein, so that the steam pressure within the tank will furnish the desired pressure for forcing the oil out through the spray device and will also constitute means for heating the oil in the tank, thus increasing its fluidity so that it will flow more freely. Where the steam is thus admitted directly to the interior of the tank, said steam will notonly force all of the oil out of the tank, but whenthe oil is exhausted the steam will then be discharged through the spray device, and during its discharge it will heat and thus increase the'fluidity of any oil or other surfacing material which may remain in or upon the spray device, and will also blow out and clean the spray device thoroughly so that said device will be ready for use again without any further attention as soon as thetaifl: has been filled.

I will first describe one embodiment of my invention and- 'then point out the novel features thereof in the appended claims.

In the drawings, Figure 1 shows in side view a tank wagon having my improvements .applied. thereto, together with a steam generator in the form of a traction engine, steam roller, or other device for drawing the wagon; Fig. 2 is a plan view of the "tank wagon with a portion broken out; Fig. 3 is a perspective view of the rear end of the tank wagon showing the spray device attached thereto; Fig. & is a view similar to Fig. 3 showing one way of varying the amount of oil sprayed per square yard of road surface, As stated above, one of the featureslofmv invention consists in admitting steagn' under Specification of Le'tterslatent.

pressure directly to the. tank containing the 011 which isto be sprayed and to which the spray device is to" be. attached, so that the Patented May 20, 1913. Application filed March 27, 1911. Serial No;'617,04 9, I

steam will not only provide the required pressure ifor spraying the oil, but willkserve to heat the oil to some extent and thus increase its fluidity, and will also act as a means for thoroughly cleaning out the spray device when the tank has been emptied.

In the preferred embodiment of any in-.

.vention I propose to attach the spray device directly to a tank wagon having, a tank thereon adapte'd to withstand internal pressure and in which the oil or other road-surfacing material is contained, although the invention might be used in connection with any, oil-receiving receptacle adapted to be transported over a road'and constructed to withstand internal steam pressure.

. ,In the embodiment of the inventionherein shown, 1 designates generally a"tank wagon having a tank 2 thereon in whichthe Oil or other road-surfacing material is received. This 'tank wagon comprises in its construction two side sills 4, as usual in devices of this class, between which the tank 2 is supported. Said tank has connected 'to the rear end thereof a quick-action valve 5 .to which is connected a pipe 6 leading to the spraydevice, said valve having a handle 7 by which it may be quickly opened or closed.

The spray. device may be of. various constructions without departing from the invention. As herein shown it comprises a plurality of spray nozzles 8 which are connected in line so as to form what amounts to a spray pipe provided with spray apertures on its under side. One or more such spray pipes may be used according to the'amount (fif oil it is desired to spray on the road surace. in which the various nozzles 8 are connected by'nipples or short pipe sections 9 so that the nipples of the pipe sections, together with the nozzles 8, form the spray pipe. This spray pipe is shown in Fig. 3 as made One convenient construction is that in two halves connected by the T 10 to which i the pipe 6 is secured, and I will preferably make the pipe 6 in two parts which are connected by an ordinary union 11, or other deof the spray 'device. The spray derice is shown as supported in arms or brackets 12 that-are secured to the'sill's 4 of the wagon,

:and each arm has at'its lpwer end acurved 11o tachable connection, to facilitate t-heremoval whereby the spray device is detachably secured to the tank Wagon and can be readily removed therefrom by simply disconnecting the union l1 and unfastening the keepers 14.

In order to practice my invention it is necessary to have a source of steam supply associated with the tank wagon. This might be accomplished by mounting a boiler directly on the tank wagon or by using the tank wagon in connection with a steam.

generator. One practical arrangement is to connect up the tank wagon to a steam roller or traction engine which will not only furnish the power for drawing the tank wagon over the road surface, but will also provide the necessary steam pressure within the tank. In the drawings I have shown at 17 a self-propelled vehicle which mi ht be a steam roller or traction engine, an to which the tank wagon is connected by means of chains or other connections 18. This self: propelled vehicle is provided with a steam boiler 19 of some suitable construction, and means are provided for delivering steam from the boiler 19 into the tank 2. This may conveniently be done by providing the boiler 19 with a steam pipe 20 which connects by means of a flexible pipe 21 with a steam pipe 22 on the tank wagon, sa'iii' pipe leading to and entering the upper part of the tank at some suitable point, as, for in.- stance, the dome 23. The pipe 20 will be provided with a suitable valve 24 to control the supply of steam to the-tank. When the device is in use the valve 24 will be opened thus admitting steam under pressure into the tank 2 above the *body pf oil,

therein, and the steam pressure, withinthe tank 2 will place the oil therein under ressure so that when the valve 5 1s opene the .oil will be forced out through the spray device. At the same time the steam in said tank 2 will heat the oil more or less and thus increase its fluidity.

Another advantage of using the steam directly on top of the body of oil within the tank 2 is that when the oil has been entirely discharged from the tank the steam within the tank will blow out through the spray device until the valve 5 is closed. The admission of steam to the spray'devic'e heats the latter and heats any oil which may be left therein or thereon, thus increasing the fluidity of said oiland theforce of the steam will blow the oil all out of the spray device, thus leaving it perfectly clean. This is a decided advantage because where the spray device is not cleaned out in this way the oil which remains therein is aptto harden or congeal, thus clogging it up and rendering it difiicult to start the spray up again when the tank has been re-filledJ' In Fi 21 have shown this coil 240 as connecte by a pipe 25 which leads to the boiler 19. The end of the heating coil 240 terminates in a valve 26 by which water of condensation may be drained ofi'. The pipe 25 will be provided with a valve90 to regulatethe supply of steam to the coil 2&0. I have also shown the pipe 22 as having connected thereto a pipe 27 which leads to the casing of the valve 5 between the latter and tank Wagon, and this pipe 27 is also r0- vided with another branch 28 which leads to'the pipe 6 on the delivery side of the valve 5, the two -pi cs 27, 28 being controlled by valves 29, 30. struction is that steam may be admitted to the valve 5 on either side thereof, thereby warming the latter, or steam may be admitted directly to the spray device without passing through the tank wagon if it is desired to heat the oil in the spray device or to blow it out.

50 designates a pressure gage connected to the pipe 22 by which the steam pressure in the tank 2 can be'determined, and 51 designates a safety valve which canbe set to relieve the steam pressure if it exceeds a predetermined amount. I

The dome 23 has a nipple or connection 52 leading into its upper end, which nipple is normally closed by a cap 53. The urpose of this is to provide means for fi lin the tank, and this can be done if desired while the tank is under C1pressure by simply forcing the oil or liquid into the tank.

he advantage of this con- The pipes 22and 27 are provided with valves 54 and 55. s

It will readily be seen that if the spray pipe is set diagonally the total width of road which a length of spray pipe will cover is less than if the spray pipe extended at right angles to the direction of movement,

and, therefore, when the; pipe is in the angular position a greater quantity of oil per square yard will be sprayed 'onthe road surface'than when the ipe extends transversely. There are various ways in which the pipe could be sustained so as to permit it to swing into different angular positions. If the spray pipe is connected centrally to the supply pipe 6, as shown in Fig. 3, a swivel connection could be readily provided between the supply pipeand the s ray pipe so as to permit the spray pipe. to e swung mto different angular positions.

In Fig. 4 I have shown a construction whereinthe spray pipe islconn'ected at. one end to the supply p1pe, said supply pipe being shown at 60 and having the horizon-- tally-extending portion 61 and the vertica'lly-extending portion 62 which leads the end of the spray pipe '63. This spray pipe 63 is connected to the vertical portion 62 of the supply pipe by a swivel joint 64 which permits the spraypipe to be swung into di rent angular posltions. Said pipe may be sustained in any suitable way as by means of a horizontally-disposed arm 65 extending from a bracket 66 extending from one of the sills 4 of the wagon. If desired this arm may be provided with apertures 67 adapted to receive positioning pins 68 be tween which the spray pipe 63 is held so that said pipe may be maintained in any desired position. When the ipe is swung into a diagonal position as sh it will cover a less width of road surface than when it stands transversely, as shown in Fig. 3, but as the same amount of oil issprayed from the pipe the result will be that a larger quantity of oil persquare yard of road surface covered is delivered than if the pipe stood at right angles to the direction of .movement of the wagon. If it is desired to cover as great a width of road surface with the spray pipe standing diagonally as only a spray pipe capable of swinging into 'difi'erent angular positions in a horizontal plane, but also an extensible and contractible spray pipe. The end'of the spray pipe is closed by a suitable plug 70,

I am aware that ithas heretofore been proposed to admit compressed air to the oilcontaining tank with which a spray device is used for the purpose of providing within the tank a suitable pressure to force the liquid out through the spray device. "My invention is to be distinguished from devices of this nature, however, in that the own in Fig. 4

pressure is v secured b the use of steam which is admitted un er pressure directly to the tank and which has the capacity for not only heating the oil within the tank, butalso cleaning out automatically the spray device My invention is not confined to use in connection with, heavy oils, such as are com- .monly used in the surfacing" of roads, but

may be used in connection with any roadsurfacing material which is capable .of' be- 1 in sprayed from a tank.

aving fully described my invention, what I claim as new and desire to'secure by Letters Patent is s 1. The. combination with a tank wagon having a discharge pipe and a .valve'in said pipe, of a spray pipe communicating with the discharge ipe, a steam pipe communicating with said discharge pi e intermediate the valve and the tank w ereby steam may be admitted to the tank through the discharge pipe, -a steam pipe communicating with said discharge p1pe in rear of'the valve whereby steam may be blown through the spray pipe, and means for applying a pressure to the tank above the liquid therein. 2. The combination. with a tank wagon having an outlet pipe and a valve in said pipe, of a steam pipe communicating-with said outlet pipe intermediate the valve and the tank'whereby steam may be admitted to the tank through the outlet pipe, a steam pipe communicating with said outlet pipe-in rear of the valve whereby steam may be blown through the spray pipe, and a spray pipe secured tothe end of said outlet pipe.

3. The combination with a tank wagon having an outlet pipe and a valve insaid pipe, of a steam pipe communicating with said outlet pipe intermediate the valve and the tank whereby steam may be admitted to the tank through the outlet pipe, asteam pipe communicating with said outlet p1pe in rear of the valve whereby steam may be blown through the spray pipe, and a spray pipe removably secured to said outlet pipe in rear of the steam pi s.

In testimony whereo I have signed my name to this specification, in-the presence of two subscribing witnesses.

FRANKLIN o PILLSBURY.

Witnessesz' LOUIS C. SMITH,

THOMAS J. DRUMMQND,

-0op1ea-ot flill patent may be obtained for five cents each, by addressingthe Commissioner of Patents. 

